A lot of Newfoundlanders settled in Montreal in the early 1900s as well, and I assume they would have contributed to any Irish influences. Construction back then had a disproportionately high number of Newfoundlanders - much like teaching in the Canadian north does today. Even the famous lunch break photo from Manhattan has two or three Newfoundlanders in it.
I can't find the PDF I read this in any more, but it was a list of the number of Newfoundland-born residents in Canadian cities in the 1920s (we were immigrants to Canada then, not part of it). Montreal had thousands, back when that would have been a sizable minority - and that, of course, doesn't include their Quebec-born family members.
It's funny that I find Dublin and cities in the U.K. so North American in certain ways, since they almost certainly came up with whatever I'm associating with North America (plain, brick, etc.) long before we did.
I vow to thee, my country - all earthly things, above; entire, and whole, and perfect - the service of my love.